CVE-2021-27662 : Vulnerability Insights and Analysis
Discover the impact of CVE-2021-27662 on Johnson Controls KT-1 door controller. Learn about the vulnerability, affected versions, and mitigation steps to enhance cybersecurity.
The KT-1 door controller by Johnson Controls is vulnerable to capture-replay attacks, allowing threat actors to intercept and manipulate TCP packets. This CVE affects all KT-1 versions up to and including 3.01.
Understanding CVE-2021-27662
This section provides insights into the impact, technical details, and mitigation strategies related to CVE-2021-27662.
What is CVE-2021-27662?
The CVE-2021-27662 vulnerability pertains to the susceptibility of the Johnson Controls KT-1 door controller to capture-replay attacks, a method that poses a significant security risk to the system.
The Impact of CVE-2021-27662
The impact of this CVE is rated as HIGH severity, with a CVSS base score of 8.6. It can lead to unauthorized access, data integrity violations, and potential security breaches due to the exploitation of TCP packet interception.
Technical Details of CVE-2021-27662
This section delves into the vulnerability description, affected systems, and exploitation mechanism associated with CVE-2021-27662.
Vulnerability Description
The vulnerability allows attackers to utilize capture-replay techniques to intercept and manipulate TCP packets, compromising the security of the KT-1 door controller.
Affected Systems and Versions
Johnson Controls KT-1 in all versions up to and including 3.01 are impacted by this vulnerability, requiring immediate attention to prevent exploitation.
Exploitation Mechanism
By intercepting and replaying TCP packets, threat actors can perform man-in-the-middle attacks on the KT-1 door controller, potentially leading to unauthorized access and data tampering.
Mitigation and Prevention
To protect systems from CVE-2021-27662, consider implementing the following measures:
Immediate Steps to Take
Upgrade the KT-1 controller to version 3.04 and enhance security by updating EntraPass to version 8.40. Ensure immediate action to mitigate the risk of capture-replay attacks.
Long-Term Security Practices
Incorporate robust encryption protocols, implement regular security assessments, and establish strong access controls to bolster the resilience of the KT-1 door controller against evolving cyber threats.
Patching and Updates
Stay informed about security advisories from Johnson Controls and relevant authorities to promptly address any emerging vulnerabilities and apply necessary patches to safeguard the system.